Without this filter, your CarPlay/Android Auto dongle for Android System will be unstable.
If your accessory USB filter(Black) is broken or missing, please purchase this.
*It's not required to purchase this filter when you are buying a whole package of wired/wireless CarPlay/Android Auto dongle. It's already included.
e.g. if you purchase this with USB dongle package, you will receive 2 black USB filter dongle.